Wireless Power Transmitter Controller Dual Communication
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Solution Overview
Problem
Existing wireless power transfer systems face challenges in maintaining compatibility between different power profiles, leading to unstable charging and potential damage to receivers due to overvoltage issues when transferring power across varying power classes.
Innovation Solution
The implementation of a wireless power transmitter and receiver that utilize both in-band and out-band communication to efficiently manage power transfer, allowing for foreign object detection and authentication, thereby ensuring stable power delivery and reducing the risk of overvoltage by matching compatible power profiles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If in-band communication is used for power transfer control, then communication efficiency is improved, but system reliability deteriorates when communication is unstable
Solution Approach 1:
The patent introduces out-band communication as an intermediary channel to handle critical control functions (authentication, FOD detection) separately from the power transfer communication channel. This mediator approach ensures that even when in-band communication fails, essential safety and control functions can still operate through the alternative out-band channel, resolving the contradiction between communication efficiency and system reliability.
2Adaptability or versatility
If wireless power transfer is performed across different power classes, then versatility is improved, but safety deteriorates due to overvoltage issues
Solution Approach 1:
The patent implements preliminary authentication and power profile matching through out-band communication before initiating power transfer. The transmitter and receiver exchange authentication messages and negotiate compatible power parameters in advance, ensuring that the power transfer only proceeds when both devices are verified as compatible. This preliminary action prevents overvoltage damage by establishing safe operating parameters before energy transfer begins.
Solution Approach 2:
The system employs bidirectional communication to continuously exchange status information and adjust power transfer parameters. The receiver provides feedback about its power handling capabilities and charging status, while the transmitter adjusts its output accordingly. This feedback mechanism ensures that power transfer remains within safe limits even when operating across different power classes, preventing overvoltage conditions while maintaining versatility.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables efficient operation by matching communication links to characteristics, allowing for continued charging even when in-band communication is not smooth and reduces the risk of damage by ensuring compatible power transfer, thus enhancing user experience and infrastructure compatibility.
Implementation Method 1
a power converter configured to transfer the wireless power to the wireless power receiver by magnetic coupling with the wireless power receiver at an operating frequency
Implementation Method 2
a controller configured to communicate with the wireless power receiver using at least one of in-band communication using the operating frequency and out-band communication using a frequency other than the operating frequency
Data Source
AI summary
A wireless power transmitter, according to one embodiment of the present specification, comprises: a power converter that transmits wireless power to a wireless power receiver and transmits the wireless power to the wireless power receiver by means of magnetic coupling with the wireless power receiver at an operating frequency; and a controller that communicates with the wireless power receiver and controls the transmission of the wireless power by using at least one of in-band communication using the operating frequency and out-band communication using a frequency other than the operating frequency, wherein the controller: transmits and receives a message to and from the wireless power receiver by using both the in-band communication and the out-band communication, wherein the controller transmits and receives a message related to detection of foreign substances between the wireless power receiver and the power converter by using the in-band communication, and transmits and receives an authentication related message to and from the wireless power receiver by using the out-band communication.